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Mathematics for IGCSE & O level - Ratio And Proportion (Section 4 - No. 29)
A machine produces 120 parts in 8 hours. How many parts can it produce in 5 hours?
60
75
80
90
Paaiškinimas
Parts per hour = 120/8 = 15. In 5 hours: 15 * 5 = 75
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